About Artificial Eyes
Since 1860, F.Ad. Müller Söhne has manufactured and fitted artificial eyes.
The following page gives background information on artificial eyes. Up until
some years ago it was fair to say that roughly one out of every 1000 European
citizens had an artificial eye. This figure is slowly decreasing since better
diagnosis and improved surgical methods can save more eyes. The art of making
artificial eyes is however far from new. Already in the 14th century, Venetian
glassblowers mastered the skill.
Material and Production
Müller Söhne uses special cryolith glass to manufacture eye prostheses. The
glass is not organic and is partially made of cryolith and partially of crystal.
These types of glass are well proven and tested and the best suited materials
regarding cosmetic appearance, usability and compatibility. They also do not
release any harmful substances.
An eye prosthesis is fitted between the upper and lower eyelids. It is not a
surgical operation to fit the prosthesis and it is not fastened in any way. The
remaining muscles in the eye socket can make the prosthesis move together with
the healthy eye. This does however depend on the surgical construction of the
eye socket. Artificial glass eyes are manufactured either as hollow balls or
very thin shells. The proper shape of the artificial eye must be determined by
an ocularist, depending on the conditions of the eye socket. The weight varies
between 1,3 and 4,5 metric grams.
glass material we use is made in Thuringia, Germany. The area has a long
tradition of glass making. It is from here that we get the glass tube that is
our base for the eye bulb, as well as material for the pupil and the iris. The
material for the iris is mixed from different combinations of coloured glass by
the ocularist. The picture to the left shows such mixed colours.
Fitting the prostheses to the patient
The artificial eye is fitted during a call to our ocularists in one of the
hospitals or towns we visit. By examining the colour of the patients remaining
eye, the ocularist can pick a suitable colour from a large set of
semi-manufactured prostheses. The ocularist has several thousands of these
prostheses available in order to get a good match. The picture down to the right
shows one tray of brown semi-manufactured prostheses.
The ocularist checks the patients old prosthesis, if available, and examines
the patients eye socket to see what size and shape the prosthesis requires.
selected semi-manufactured prosthesis is then formed into the correct shape
using a small burner. The ocularist draws the blood vessels (veins) by using
thin coloured glass threads that are melted into the white of the eye. These
threads should have a rough correspondence to the healthy eye since veins vary
both in colour and form.
When the prosthesis has cooled down it is tried on by the patient. If needed,
smaller adjustments can be made.
Every artificial eye is subject to natural wear. Because of the extremely
resistant material, the service life of an artificial eye made of glass is
relatively long. We recommend that the eye is exchanged every other year. If the
bearer of the prostheses is however subject to increased environmental
influences, the service life can diminish considerably .
Read more about manufacturing eye prostheses.